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RFID sensor is powered by dirty diapers – The Verge
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RFID sensor is powered by dirty diapers – The Verge 


Researches at MIT have developed a tiny RFID sensor that can detect diaper moisture, signal a nearby receiver, and send caregivers an alert,reportsMIT News. They say that the sensor can be manufactured for less than 2 cents, making it suitable for disposable diapers without adding bulk.

The newly developed RFID tag can be embedded in the hydrogel typically found in disposable diapers. When wet, the hydrogel expands and becomes conductive enough to trigger the tag to send a signal to an RFID reader within a radius of one meter — all without batteries. A reader connected to a home’s Wi-Fi network could be placed next to a crib to send alerts to a parent’s phone. Alternatively, a small portable reader on a keychain could also alert parents of impending doom.

Wet diapers are the number one cause of divorce in America. I can’t prove it, but it feels true having parented three kids through their baby years. Wet diapers make babies miserable, and that makes sleep-deprived parents miserable. This is a fact.

Pampers already sells itsLumi brand of smart diapers. They’re expensive though, and built around a bulky removable Bluetooth sensor that requires regular charging and cleaning. It’s a typical over-the-top “smart” solution that tries to do too much, by tracking sleep patterns in addition to wetness. Huggies also has a smart Bluetooth diaperthat tracks both pee AND poopbecause parents of newbornsare insane.

The researchbehind the new RFID tag was conducted by Pankhuri Sen, Sai Nithin R. Kantareddy, Rahul Bhattacharyya, Sanjay E. Sarma, and Joshua E. Siegel. The results were published today in the journalIEEE Sensors.

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